Which circuit would stop current if there is an obstruction along the circuit path?

• A. Open Circuit
• B. Parallel Circuit
• C. Series Circuit
• D. Closed Circuit

Answer: (C)

Current needs a complete path to flow. In a series circuit there is only one loop for electrons, so there’s a single path. If something blocks that path, the loop is broken and current can’t flow at all, so the entire circuit stops. In a parallel circuit, there are multiple paths; blocking one branch won’t stop current in the other branches, so the overall circuit can still carry current. An open circuit is a broken path that stops current, while a closed circuit has a complete path that allows current to flow. So the setup where a single obstruction halts all current is the series arrangement.